Your in for a pretty good size job doing all that.
Jack up all for wheels and set on jack stands or the like.
Drain the master cylinder.
Remove front wheels.
Remove caliper and disconnect brake line. Brake fluid will run out, a small amount.
The rotor may be rust welded to the spindle, smack it with a hammer til it comes off the wheel studs.
Buy fully loaded calipers, meaning with the pads installed.
If the brake hose shows signs of cracking, replace that also.
Install rotor, caliper and hose if needed.
Do other front side.
The rear gets more involved, requires that the axle and outer bearing be removed, then the drum. A small amount of diff oil will come out, use a pan to catch it. Check the diff oil level when done with the brakes.
Best to change the rear brake cylinders at this time. Also the hose if needed.
You need at least 2 quarts of brake fluid to bleed and flush.
Refill the master cylinder and keep full while bleeding.
Starting at the right rear, bleed the air out, then the left rear, right front then left front.
Harbor Freight has a brake bleeding pump that works quit well if your alone doing that.
Edit: May have to bleed several times to get all the air out.
http://www.harborfreight.com/automo.../brake-bleeder-and-vacuum-pump-kit-92474.html
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